Poppet valve



July 14, 1931. |14 GLAENZE Y I 1,814,913

` POPPET VALVE Filed April 30, 1930 2 Sheeis-Sheet `l PoPPET VALVE i 'Filed Aprii so. 1930 2 sheets-sheet 2 Patented July 14, 1931 4 UNITED STATES HARRY GLAENZER, OF PHILADELPHIA, PENNSYLVANIA rorrn'r VALVE Application filed April 30, 1930. Serial No. 448,751.

My invention relates to certain improvements in poppet valves, and while the invention is especially adapted for use in poppet valves for the Caprotti valve gear as disclosed in the Caprotti Patent No. 1,549,712 dated August 11, 1925, it will be understood that it can be used in other types of valve mechanisms without departing from the essential features of the invention.

.10 `The object of the invention is 'to cheapen and facilitate the manufacture of this type of valve, as well as to provide some flexibility in the construction whereby cracks and strains may be eliminated. This construc- '15 tion allows the valve ring proper to be made of nickel chrome steel and the spider of ordinary steel, which materially cheapens the manufacture. i

In the accompanying drawings:

.o Fig. 1 is a transverse sectional view of my improved poppet valve, showing it located in the valve chest which is illustrated by dotted lines;

Fig. 2 is a plan view partly in section;

-J Fig. 3 is a sectional plan view on the line 3-3 of the valve ring; and

Fig. 4 is a plan view of the spider in a position to be inserted in the ring.

1 is a poppet valve which in the present So instance is located within a valve chest comprising a seat ring 2 having an upper seat 3 and a lower seat 3a connected as shown. The valve 1 is a double-seated valve and has an annular recess 4 therein, and at the lower 127i end of the recess in the valve is a flat seat 5a. T he upper seat 5 of the valve Vis conical, with its apex m ofthe seat lying in the plane y of the flat face. This arrangement secures a steam tight closure at all temperatures as l0 any isotropic expansion of the valve or seat follows the law of geometric similarity. rlhis particular design of valve especially fits it for use with the Caprotti valve gear, although the valve can be used wherever the 45 requirement calls for a poppet valve.

The valve 1 is mounted on a spindle 6 adapted to bearings in the parts of the valve chest shown by dotted lines. The particular construction of the chest forms no part of the present invention. The poppet valve 1 is made in two parts, a valve ring proper 7 and a spider 8. This spider has a hub 9, which is secured to the valve stem as shown and has arms 10 which are enlarged at their outer ends as at 11. The eXtreme ends of the arms '.1

are preferably slightly curved on the same curve as the pads 12 of the inner surface of the valve ring 7. The diameter of the opening in the ring at the pads is somewhat less than the diameter of the opening between the pads. This construction allows the ready assembly of the spider within the ring. The spider, being in the position shown in Fhig. 4, can be dropped into the ring between t e the spider will align with holes 14 in the inwardly projecting lugs 15 which extend above and below the spider as shown in the sectional view Fig. 1. Pins or bolts 16 are then inserted in the holes, locking the ring firmly to the spider. In the drawings a headed pin is shown which is driven into position and riveted so as to permanently secure the parts together.

I claim:

1. The combination in a valve, of a ring; inwardly projecting lugs on the ring; pads on the ring at the lugs; a spider having a hub and projecting arms, the ends of the arms fitting against the pads when in position; and means securing the arms to the lugs of the ring, the inner ydiameter of the ring being greater at the points between the lugs than at the lugs so that the spider can be readily inserted in the ring and turned into position.

2. The combination in a poppetvalve, of a valve ring proper having an annular recess in its periphery; a seat at the lower end of the recess and a seat on the ring above the upper edge of the recess, the first-mentioned v pads and then turned so that holes 13 in cL-l f2'y v 1,814,913

seat being flat and the other seat being conical; a Spider; and means for securing the spider to the valve ring proper.

3. The combination in valve mechanism, of a valve chest having upper and lower seat-s; a valve spindle; a spider having a hub mounted on the spindle, said hub having arms; a Valve ring proper having an annular recess therein and upper and lovv'er seats, the upper seat being conical and the lower seat being flat and adapted to the seats of the valve chest; and means for securing the valve ring proper to the arms of thefspioler. A

HARRY GLAENZER. 

